# CO2 Modeller vs Thermodynamics Calculators

The clearest difference is review sentiment: CO2 Modeller at 75% against Thermodynamics Calculators's 0%. CO2 Modeller also leads on in-app purchases (none vs 3) and device support (3 vs 1). Thermodynamics Calculators's advantage is rating (5.0 vs 2.5) and update cadence (weekly vs every 36 months). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Thermodynamics Calculators sells 3 one-off in-app purchases. CO2 Modeller asks for nothing beyond the download.

Thermodynamics Calculators holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews complicate that: 75% of CO2 Modeller's written reviews are positive against 0% of Thermodynamics Calculators's, so the app with the better star average is not the one people write more warmly about.

CO2 Modeller ships an update every 36 months, Thermodynamics Calculators weekly. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | CO2 Modeller | Thermodynamics Calculators |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/co2-modeller/id1037101261/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/thermodynamics-calculators/id1483394450/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | **75.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 36 months | **Weekly** |
| Monetization | Free | Free |
| Size | 9 MB | 6 MB |
| Requires iOS | **12.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alex Rogers](https://appshunter.io/developer/346832869) | [Lucy Enterprises](https://appshunter.io/developer/1656612108) |

## What reviewers say

### CO2 Modeller

[App page](https://appshunter.io/ios/app/co2-modeller/id1037101261)

Simulate the impact of reducing carbon emissions on climate change. This app generates projections for atmospheric CO2 concentration, global warming, sea level rise, and ocean acidification.

**Highlights:** Model carbon emission reductions, Simulate climate change effects, Project CO2 concentration, Estimate global warming, Predict sea level rise, Analyze ocean acidification

**Features:** macOS Compatibility

**In-app purchases:** none


### Thermodynamics Calculators

[App page](https://appshunter.io/ios/app/thermodynamics-calculators/id1483394450)

This app provides engineering professionals with a powerful tool for thermodynamics calculations. It features a comprehensive dataset for various species and a range of building blocks to construct complex models. An illustrative sample model is included for guidance.

**Highlights:** Temperature-dependent property data for 8 species, Building blocks for model creation, Daisy-chaining blocks for complex models, Includes one sample model, Validated against commercial software

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Edit option | $0.99 | one-time |
| Remove ads | $1.99 | one-time |
| Modeling access | $4.99 | one-time |


## Frequently asked questions

### Is CO2 Modeller free?

CO2 Modeller is free to download, with no in-app purchases.

### Is Thermodynamics Calculators free?

Thermodynamics Calculators is free to download, with in-app purchases available.

### Which has better reviews, CO2 Modeller or Thermodynamics Calculators?

Thermodynamics Calculators is rated higher. CO2 Modeller averages 2.5 out of 5 from 2 ratings, while Thermodynamics Calculators averages 5.0 from 2 ratings.

### Do CO2 Modeller or Thermodynamics Calculators have ads?

Neither CO2 Modeller nor Thermodynamics Calculators shows ads.

### Which is updated more often, CO2 Modeller or Thermodynamics Calculators?

CO2 Modeller ships an update every 36 months, and Thermodynamics Calculators weekly. Most recently, CO2 Modeller was updated on October 2, 2026 and Thermodynamics Calculators on September 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*